Look up the Brown Whelen, the standard AI, the 350 Elliott, and others as they pop up in your searches.
The standard Whelen has the same 17 1/2 degree shoulder as the parent 06. There are at least three different shoulder angles and body tapers.
The narrow shoulders of the standard Whelen case cause issues with headspace in the original and the improved versions give you positive headspacing and extended case life.
IIRC the standard AI has a 35 degree shoulder and the Brown Whelen 40.
Always chamber cast a Whelen before shooting it...
Mark Begich, Joaquin Jackson, and Heller resistance... Three huge reasons to worry about the NRA.
